Twister ring and traveler



Oct. 22, 1929. J AVERY 1,732,785

I TWISTER RING AND TRAVELER Filed May 11, 1,927

all

the traveler, in acting as a drag,

that the traveler foot is drawn up Patented Oct. 22, 1929 UNITED STATESPATENT OFFICE JAMES H. AVERY, 0F FRANKLIN, MASSACHUSETTS, ASSIGNOR T0NATIONAL. RING TRAVELER 00., 0F PROVIDENCE, RHODE ISLAND, A OORPORATION0F RHODE ISLAND Application filed May 11,

The twister traveler as at present constructed is a compromise betweentwo factors of opposite tendency, one the necessity of having sufficientsurface friction between the traveler and the ring to cause the travelerto drag and thereby impart twist to the yarn, and the other the naturaltendency to relieve the friction as much as possible.

In the earliest form of twister traveler, the necessity for the travelerto act as a drag and thereby impart twist to the yarn was not perceivedand the traveler was made practically no friction surface between itsflanges.

The first real improvement in the twister traveler came when theso-called broken back traveler was brought out many years ago. In thistype of traveler, the back of the traveler was bent to provide afriction Sur-- This method of lubrication, however, had

its disadvantages, and within recent years Mr. Philip C. Wentworthdevised and patented a twister traveler in which the traveler itself wasprovided with a lubricant pocket on the outer face of its back,lubricate itself. (Wentworth Patent N 0. 1,415,072, dated May 9, 1922.)

The design of the broken back traveler, either with or without theWentworth lubricant pocket, is followed today and such travelerstherefore may be considered as hereto fore standard in the art. Thedifliculty with this traveler, however, is that it is somewhat top heavyin action and does not ride the ring in true balance. This is due to thefact that tends to tip rotation so against the forwardly in thedirection of so as automatically to TWISTER RING AND TRAVELER 1927.Serial N0. 190,594.

bottcm edge of the ring and soon develops wear.

I have discovered that this wear can be reduced, thereby materiallyprolonging the life of the traveler, while at the same time avoiding thetendency of the traveler; to tilt forwardly in the direction of rotationand thus ride the ring out of balance.

My invention is a departure, from conventional design in both ring andtraveler, but such departure results in a better balancing of thetraveler while running on the ring and a reduction in the wear atthetraveler foot, without, however, lessening the twist imparted to theyarn by the traveler.

According to my invention, the twister ring is so designed as to presenta surface of greater thickness at its bottom than at its top edge,

the arc of a truev the bottom being rounded in circle and the insideface of the ring being beveled on'about a 10 angle from top to bottom soas to present an inclined plane or cam face. The traveler iscorrespondingly changed, being curved on a larger are at its foot, so asto provide a preponderance of weight at the foot, and having its backinclined to correspond to the inclination of the inside face of thering.

As a result of these departures in traveler and ring construction, thepreponderance of traveler weight is at the bottom or foot of thetraveler, that is to say, the center of gravity of the traveler islowered so that the traveler rides the ring in better balance, standingmore nearly vertical thereon and not being top heavy, thus reducing wearand prolonging the life of thetraveler, and the design of the ring issuch as to cooperate towards the attainment of these desiderata.

. While not committed to any exact theory, it would seem that thisaction is due to the fact that in the run of the traveler, thecorrespondingly inclined faces of the ring and traveler back act asa'cam to lift the traveler vertically in a plane which is the resultantof the centrifugal force tending to throw the traveler horizontally offthe ring and the upward lifting action of the inclined plane or camsurface thus provided by the upwardly beveled face of the ring andtraveler.

In my theory of-this action, the tendency of the traveler to liftvertically in a plane which is the resultant of these two counteractingforces is offset by the preponderance of weight at the foot of thetraveler, so that in theory at least, the one equalizes the other,resulting in the traveler riding the ring in theoretically perfectbalance.

As illustrative of my invention, I show in the accompanying drawings aform of traveler and ring which I have found satisfactory under actualconditions of use. In these drawings:

Fig. 1 is a section of a twister ring in accordance with my invention,equipped with a twister traveler in accordance with my invention, and

Fig. 2 is an enlarged diagrammatic view in which I have attempted toillustrate the theory of my invention.

The ring R conforms to accepted twister ring design except that my ringis of greater thickness at its bottom edge than at its top, as indicatedat 1, the bottom being curved on the arc of a true circle, and the innerface of the ring being beveled at approximately a 10 angle from top tobottom, resulting in an inclined cam or bearing face 2 of upward liftingtendency.

Similarly, my twister traveler follows generally accepted travelerdesign, except that it also is of greater thickness at the bottom thanat the top, as indicated at 3, and has its back beveled as at 4 on anincline corresponding to the inclination of the bearing face 2 of thering. This results in a traveler in which there is a preponderance ofweight at the bottom or foot, and hence a lower center of gravity thanthe old style top heavy broken back traveler.

I have attempted diagrammatically to illustrate the action of myimproved traveler and ring in Fig. 2, wherein the line C F indicates thelines of centrifugal force; the line L the line of lifting action of thetraveler, due to the fact that the beveled bearing faces of the ring andtraveler present an inclined .plane along which the traveler tends toride upwardly; and the line r the resultant of these two counteractingforces 0 F and L. The resultant 1' represents therefore the theoreticalupward lift of the traveler which may be assumed to be the vertical axisof the traveler. By reason, however, of the prepOnderance of weight atthe foot of the traveler, indicated at W, and representing the gravitypull of the traveler in a direction opposite to its upward liftingtendencyv 1', the counteracting forces 7 and IV theoretical- 1y, atleast, will counterbalance each other so that the traveler will ride inperfect balance on the ring, assuming and maintaining a position whichis vertical and in which the upper flange of the traveler is wholly freeof the upperedge of the ring and its lower flange or foot is in truebearing on the lower edge of the ring, thereby relieving wear at thetraveler foot.

As I have stated hereinbefore, I do not wish to be confined to any exacttheory of operation. Results, however, are apparent and demonstrable,and these results show a marked improvement in the balancing of thetraveler, with corresponding diminution in wear on both traveler andring.

While applicable to either the old style traveler without the Wentworthlubricant pocket or to the Wentworth self-lubricating traveler, I havepurposely shown my invention as applied to the Wentworth type travelerin which a lubricant pocket 5 is formed in the traveler back.

Various modifications in the design of both ring and traveler mayobviously be made within the spirit and scope of my invention as definedby the appended claims.

What I therefore claim and desire to secure by Letters Patent is 1. Incombination, a twister ring and a traveler thereon, each havingcooperating inclined bearing surfaces disposed to give an upwardresultant from the outward centrifugal tendency of the traveler inrotation.

2. In combination, a twister ring and a traveler thereon, each havingcooperating inclined bearing surfaces disposed to give an upwardresultant from the outward centrifugal tendency of the traveler inrotation, the lower edge of the ring being curved on a radius greaterthan that of its upper edge and the lower edge of the traveler beingsimilarly curved to correspond to the lower edge of the ring andpresenting a preponderance of weight below its center.

3. In combination, a twister ring and a traveler thereon, each havingcooperating inclined bearing surfaces disposed to give an upwardresultant from the outward centrifugal tendency of the traveler inrotation, there being a preponderance of weight at the traveler foot andsuch preponderance substantially counterbalancing the upward liftingaction of the traveler.

4. In combination, a twister ring having an inclined bearing surface onits inner face and a traveler having a correspondinglv inclined bearingface cooperating therewith.

5. In combination, a twister ring having an inclined bearing surface onits inner face and a traveler having a correspondingly inclined bearingface cooperating therewith, the lower edge of the ring being curved on aradius greater than that of its upper edge and the lower'edge of thetraveler being similarly curved to correspond to the lower edge of thering and presenting a preponderance of weight below its center.

6. A vertical twister ring having a bearing face of upward flare toimpart an upward lifting effect to a traveler riding on said ring gndhaving a correspondingly flared bearing ace.

7 A vertical twister ring having on its in her face a conicbearingsurface of upward flare effective to impart an upward liftingeffect to a traveler riding on said ring and lfiaving a correspondinglyshaped bearing ace.

8. A vertical twister ring having a beveled inner face of upward flareeffective to impart an upward lifting effect to a traveler riding onsaid ring and having a correspondingly beveled bearing face.

9. A vertical twister ring having a beveled inner face of upward flareand a rounded lower edge of greater radius than its upper edge andeffective to impart. an upward lifting effect to a traveler riding onsaid ring and having its bearing face correspondingly shaped and itslower edge correspondingly curved. i

10. A vertical twister ringhaving a rounded lower edge of greater radiusthan its upper edge and adapted to support a traveler having its loweredge correspondinglv curved.

11. A vertical twister ring thicker at its bottom edge than at its topedge and adapted to support a traveler having its lower edgecorrespondingly thickened.

-12. A vertical twister ring thicker at its 'bottom edge than at its topedge and having its inner face beveled between said edges to provide abearing surface of upward flare effective to impart an upward liftingeffect to a traveler riding on said ring and having its bottom edgecorrespondingly thickened and its bearing face correspondingly shaped.

13. A twister traveler for use on a vertical twister ring having anupwardly inclined bearing surface and a rounded lower edge of greaterradius than its upper edge, consisting of a member having acorresponding ly inclined bearing surface and having its lower horncorrespondingly curved on a greater radius than its upper horn.

14. A twister traveler for use on a vertical ring having an upwardlyinclined bearing surface and a rounded lower edge of greater radius thanits upper edge, consisting of a member having a correspondingly inclinedbearing surface and having its lower horn correspondingly curved on agreater radius than its upper horn to present an excess of weight belowthe longitudinal center thereof.

15. A twister traveler for use on a vertical twister ring having abearing face shaped to provide a bearing surface of outward flareeffective to impart an upward lifting to the traveler, consisting of amember having its back formed to provide a correspondingly shapedbearing surface of outward flare.

17 A twister traveler for use on a vertical twister ring having abearing'face shaped to provide an upwardly inclined bearing surfaceeffective to impart an upward lifting effect to the traveler, consistingof a member having a portion of its back formed to provide acorrespondingly inclined bearing surface.

18. A twister traveler for use on a vertical twister ring having abearing face shaped to provide an upwardly inclined bearing surface andhaving a rounded lower edge of greater radius than its upper edge and offective to impart an upward lifting effect to the traveler, consistingof a member having a portion of its back formed to provide acorrespondingly inclined bearing surface and having its lower horncorrespondingly curved on a greater radius than its upper horn.

19. A twister traveler for use on a vertical twister ring having abearing face shaped to provide an upwardly inclined bearing surfaceeffective to impart an upward lifting effect to the traveler, consistingof a member having a portion of its back bent to provide acorrespondingly inclined bearing surface and having its lower horncurved on a greater radius than its upper horn to present an excess ofweight below the longitudinal center thereof.

In testimony whereof I affix my signature.

JAMES H. AVERY.

